body {
    background-image: url('../image/城市夜景-捷克布拉格-02-全景.jpg');
    /* 图片路径 */
    background-size: cover;
    /* 自动缩放图片，铺满整个页面 */
    background-repeat: no-repeat;
    /* 不重复 */
    background-position: center center;
    /* 居中显示 */
    height: 100vh;
    /* 确保 body 有足够高度 */
    margin: 0;
    /* 去掉默认外边距 */
}

.nav {
    padding-left: 50px;
}

#bottom-message {
    display: flex;
    justify-content: flex-end;
    padding-right: 20px;
}

#bottom-message a {
    margin-left: 10px;
    text-decoration: none;
    color: inherit;
}

#bottom-message a:active {
    color: rgb(255, 255, 255);
}

.login-container {
    width: 100%;
    height: calc(100% - 50px);

    display: flex;
    align-items: center;
    justify-content: center;
}


.login-dialog {
    width: 480px;
    height: 320px;
    background-color: rgb(147 174 200 / 75%);
    border-radius: 15px;
}

.login-dialog h3 {
    text-align: center;
    padding: 50px 0 20px;
    font-size: 35px;
}

.login-dialog .row {
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px 0;
}

.login-dialog .row span {
    display: block;
    width: 100px;
    font-weight: 700;
    padding-left: 30px;
}

#username,
#password {
    display: flex;
    width: 250px;
    height: 35px;
    font-size: 20px;
    text-indent: 10px;
    border-radius: 10px;
    border: none;
    outline: none;
}

#submit {
    width: 350px;
    height: 40px;
    background-color: rgb(0, 128, 0);
    color: white;
    border: none;
    font-size: 20px;
    border-radius: 10px;
}

#submit:active {
    background-color: #666;
}